This is a tough test. From 10,000ft to 14,400 ft in 5 miles is hard going. The altitude will hit you at about 11 to 12,000 ft. It took me 4 hours to hike to the top. Did feel the altitude but pushed on through it
People along the trail did suffer and turned back
After you leave the tree line it's heavy going
It's for seasoned altitude hikers.
A great accomplishment.
Good luck